Confidence votes 210. Antigone is considered a tragic hero, because tragic heroes have several qualities: They are royal, they have a tragic flaw that leads to their downfall, they have an unhappy ending, and lastly the character is worthy of concern. First, Antigone is royalty. This is shown through her bloodline in several ways.
The down feathers of eider ducks provide insulation due to lack of barbules and ability to fluff. Infrared image of a goose, showing its insulating capacities. Down feather structure is important for insulating properties. Eiders insulate their arctic nests with down feathers. Click/tap images for attribution and license information.
Effect of Fur and Feather. In mammals with a haircoat and birds with a full plumage, a layer of air is trapped between the surface of the skin and the outer surface of the haircoat or plumage. Air has a low heat capacity and is a poor conductor of heat, therefore it serves as an insulator. Seal in water, demonstrating the insulating properties of blubber. If this insulating layer of air is replaced by water, heat is readily lost from the skin's surface, leading to a decrease in core body temperature and ultimately hypothermia. The layer is protected by secretions from the skin onto the fur or feathers.